<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="father">
    <h1>标题一</h1>
    <p id="p1">p1</p>
    <p class="p2">p2</p>
</div>
<script>
    var self = document.getElementById('p1');
    var father = p1.parentElement;
    father.removeChild(self);
    // 删除是一个动态过程
    father.removeChild(father.children[0]);
    // father.removeChild(father.children[1]);
    // father.removeChild(father.children[2]);
</script>
</body>
</html>